Product Description

Product Description

608 Bearing

A 608 bearing is a type of deep groove ball bearing commonly used in various applications such as skateboards, inline skates, and fidget spinners. It belongs to the 600 series of bearings and has dimensions of 8mm inner diameter, 22mm outer diameter, and 7mm width.


  • Smooth Operation: The 608 bearing is designed for smooth rotation and reduced friction, making it ideal for high-speed applications.
  • Durable: Made from high-quality materials such as steel or ceramic, these bearings are durable and long-lasting.
  • Versatile: Due to its standard size and performance, the 608 bearing can be used in a wide range of applications beyond just skateboard wheels.


  1. Skateboards
  2. Inline Skates
  3. Fidget Spinners
  4. Electric Motors
  5. Hand Tools

Whether you’re a skateboarder looking for a reliable bearing for your wheels or a hobbyist building your own spinner, the 608 bearing is a versatile and essential component for various mechanical applications. 

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Meteria: Bearing Steel
Sealing: Zz 2RS Open
Precision: P2 P4 P5 P6 P0
Noise: Z1 Z2 Z3
Service: OEM ODM
Size: 8mm*22mm*7mm
US$ 0/Piece
1 Piece(Min.Order)

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deep groove ball bearing

How do deep groove ball bearings contribute to the smooth operation of electric motors?

Deep groove ball bearings play a crucial role in ensuring the smooth operation of electric motors. Their specific design features and capabilities contribute to the overall performance and efficiency of electric motors. Here’s a detailed explanation of how deep groove ball bearings contribute to the smooth operation of electric motors:

  • Reduced Friction:
  • Deep groove ball bearings are designed to minimize friction between the rotating components of an electric motor. The smooth rolling motion of the steel balls within the deep raceway reduces frictional resistance, resulting in less energy loss and efficient power transmission. This leads to smoother operation and improved overall motor performance.

  • Low Noise and Vibration:
  • Deep groove ball bearings help dampen vibrations and reduce noise generation in electric motors. The precise alignment of the inner and outer rings, combined with the smooth rolling motion of the balls, minimizes vibrations that can cause noise. This results in quieter motor operation, which is particularly important in applications where noise reduction is desired, such as in household appliances or office equipment.

  • High-Speed Capability:
  • Electric motors often require high-speed rotation to achieve efficient performance. Deep groove ball bearings are designed to handle high rotational speeds, allowing electric motors to operate at their intended speeds without compromising performance or reliability. The smooth and continuous rolling motion of the balls within the deep raceway enables the motor to achieve and maintain high speeds with minimal friction and heat generation.

  • Radial Load Support:
  • Deep groove ball bearings are capable of supporting both radial and axial loads. In electric motors, radial loads are common due to the weight and forces exerted on the rotating shaft. Deep groove ball bearings efficiently transmit and distribute these radial loads, providing support and stability to the motor’s rotating components. This ensures smooth and balanced operation, reducing the risk of premature wear or damage to the motor’s internal parts.

  • Long Service Life:
  • Deep groove ball bearings are designed for durability and long service life in electric motors. They are typically manufactured using high-quality materials and precision engineering techniques. This results in bearings that can withstand continuous operation, high-speed rotation, and various operating conditions without significant wear or performance degradation. The long service life of deep groove ball bearings contributes to the smooth and reliable operation of electric motors over extended periods.

  • Versatility and Availability:
  • Deep groove ball bearings are available in a wide range of sizes, configurations, and materials to suit different electric motor designs and applications. This versatility allows motor manufacturers to select the most appropriate bearing based on factors such as load requirements, speed capabilities, and operating conditions. The availability of deep groove ball bearings from numerous suppliers ensures easy sourcing and replacement options, further contributing to the smooth operation of electric motors.

In summary, deep groove ball bearings contribute to the smooth operation of electric motors through reduced friction, low noise and vibration levels, high-speed capability, effective support of radial loads, long service life, versatility, and availability. By incorporating deep groove ball bearings into electric motor designs, manufacturers can optimize performance, efficiency, and reliability, resulting in smooth and trouble-free motor operation in a wide range of applications.

deep groove ball bearing

Can you explain the design principles of deep groove ball bearings and their functions?

Deep groove ball bearings are designed based on specific principles to ensure their optimal performance and functionality. Here’s a detailed explanation of the design principles of deep groove ball bearings and their functions:

  • Internal Geometry:
  • The internal geometry of deep groove ball bearings is characterized by the presence of deep raceway grooves in both the inner and outer rings. These grooves enable the bearings to accommodate radial loads, axial loads, or a combination of both. The geometry of the raceway grooves is designed to distribute the load evenly along the rolling elements, minimizing stress concentrations and maximizing load-carrying capacity.

  • Rolling Elements:
  • Deep groove ball bearings utilize steel balls as rolling elements. The balls are typically made of high-quality bearing steel and are precision-ground to ensure smooth and consistent rolling. The number, size, and arrangement of the balls in the bearing determine its load-carrying capacity and rotational characteristics. The rolling elements reduce friction and enable the efficient transfer of loads, allowing the bearing to operate with minimal energy losses.

  • Cage:
  • A cage, also known as a retainer, is used in deep groove ball bearings to separate and guide the rolling elements. The cage holds the balls in position, ensuring proper spacing and alignment, and preventing contact between them. The main function of the cage is to maintain ball separation, reduce friction, and enable smooth rotation. Common cage materials include steel, brass, or synthetic polymers.

  • Sealing and Shielding:
  • Deep groove ball bearings may incorporate sealing or shielding mechanisms to protect the internal components from contaminants and retain lubrication. Seals are designed to provide a barrier against dust, dirt, and moisture, while shields offer protection from larger particles. These protective features help extend the bearing’s service life, improve reliability, and maintain proper lubrication conditions.

  • Lubrication:
  • Lubrication is essential for the smooth operation and longevity of deep groove ball bearings. Proper lubrication reduces friction, heat generation, and wear of the bearing components. The choice of lubricant and the method of lubrication depend on the application requirements and operating conditions. Common lubrication methods include grease packing, oil bath, oil mist, or centralized lubrication systems. Adequate lubrication ensures optimal performance, reduces maintenance needs, and extends the bearing’s lifespan.

  • Mounting and Fitting:
  • Deep groove ball bearings are designed for easy mounting and fitting onto shafts or in housings. They typically have standardized dimensions and tolerances to facilitate interchangeability. Proper mounting techniques, such as using the correct fitting tools and applying appropriate axial and radial clearance, are crucial for achieving optimal bearing performance, reducing stress, and preventing premature failure.

In summary, the design principles of deep groove ball bearings encompass internal geometry with deep raceway grooves, rolling elements in the form of steel balls, cages for ball separation, sealing or shielding mechanisms for protection, lubrication systems for friction reduction, and easy mounting and fitting. These design elements work together to ensure the smooth operation, load-carrying capacity, durability, and reliability of deep groove ball bearings.

deep groove ball bearing

Can you provide insights into recent advancements in deep groove ball bearing technology?

Recent years have seen several advancements in deep groove ball bearing technology, driven by the constant pursuit of improved performance, durability, and efficiency. These advancements have been made possible through innovations in materials, manufacturing processes, and design techniques. Here are some insights into the recent advancements in deep groove ball bearing technology:

  • Advanced Materials:
  • New materials and alloys have been developed to enhance the performance of deep groove ball bearings. For example, the use of high-performance steels and ceramics has gained popularity. These materials offer enhanced strength, corrosion resistance, and high-temperature capabilities, allowing deep groove ball bearings to operate in demanding environments with improved reliability and longevity.

  • Surface Engineering and Coatings:
  • Advancements in surface engineering and coatings have contributed to the performance of deep groove ball bearings. Innovative coating technologies such as diamond-like carbon (DLC) coatings and various nano-coatings can reduce friction, improve wear resistance, and enhance the overall efficiency of bearings. These coatings also provide protection against contaminants and extend the bearing’s operating life.

  • Improved Manufacturing Processes:
  • Manufacturing techniques have been refined to achieve higher precision and quality in deep groove ball bearings. Advanced machining processes, such as precision grinding and superfinishing, enable tighter tolerances and smoother surface finishes. This results in improved bearing performance, reduced noise levels, and enhanced operational efficiency.

  • Design Optimization:
  • Design optimization has played a significant role in recent advancements in deep groove ball bearing technology. Computer-aided design (CAD) and finite element analysis (FEA) tools have enabled engineers to optimize bearing geometries, load distribution, and cage designs. These advancements have led to improved load-carrying capacity, reduced friction, and enhanced overall performance of deep groove ball bearings.

  • Sealing and Lubrication:
  • Advancements in sealing and lubrication technologies have improved the reliability and maintenance requirements of deep groove ball bearings. Effective sealing mechanisms, such as contact seals or non-contact seals, provide better protection against contamination and moisture ingress, extending the bearing’s service life. Additionally, advancements in lubrication techniques, such as the use of advanced greases and solid lubricants, enhance the bearing’s efficiency and reduce friction.

  • Sensor Integration:
  • Integration of sensors within deep groove ball bearings has emerged as a recent advancement. These sensors can monitor various parameters, such as temperature, vibration, and load, providing real-time data on bearing health and performance. This enables proactive maintenance and condition monitoring, allowing for timely interventions and preventing potential failures.

In summary, recent advancements in deep groove ball bearing technology have focused on the development of advanced materials, surface engineering and coatings, improved manufacturing processes, design optimization, sealing and lubrication techniques, as well as sensor integration. These advancements have resulted in deep groove ball bearings with enhanced performance, durability, and efficiency. As a result, industries across various sectors can benefit from these advancements, experiencing improved reliability, reduced maintenance, and optimized operational performance.

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editor by CX 2024-04-12